A collection of Typst math commands/shortcuts defined for the purpose of having the same/similar names as LaTeX math expressions. For references, I used the maths-symbols package documentation (which is the shorter predecessor of the longer and more detailed comprehensive package documentation), the newcm-unimath-symbols documentation for the newcomputermodern fonts, and the Typst documentation.
Either simply copy the contents of LaTeX-math-expressions-in-Typst.typ into your *.typ file or use the import Typst command.
I tried to create makeshift commands for some of the less common math symbols listed in the maths-symbols package documentation which don't have Unicode character equivalents but the results are still far from being ideal.